1. Which is largest Creature in world ?

Answer: Blue Whale

2. Longest rail tunnel in the world ?

Answer: Seikan Tunnel (Japan - 53.9 Km)

3. Which is Largest Dome in World ?

Answer: St. Peter's Basilica (Rome)

4. Which is highest dam in world ?

Answer:

Jinping-I Dam - 305 m (1,001 ft) in China on Yalong river.
Second Highest is Nurek Dam 300 m (980 ft) Tajikistan on Vakhsh river.

5. Which is the largest epic in world ?

Answer: Mahabharat

6. Which is smallest planet ?

Answer: Mercury

7. Which is Highest Gallantry Award in India ?

Answer: Paramveer Chakra